Answer
The Bhagavata Purana presents the following depiction of Vaikuntha. I shall explain later how this can be transformed into a Vaikuntha meditation.
(In the ninth chapter of the second Skandha of the Bhagavata Purana)
The Lord, pleased with the tapasya of Brahmaji, revealed to him His divine abode. It was a realm that was supreme -- above which there exists no other realm. There was neither sorrow, nor delusion, nor fear. This realm is beheld and celebrated by divine beings. Here exists the pure and unmixed Sattva Guna -- there is no entry for Rajoguna or Tamoguna, nor does the assault of Time (Kala) reach here. Even Maya cannot enter there. This abode belongs to those devotees who are the exclusive followers of the Lord and who are revered by both Devas and Asuras.
The divine beings residing in that realm were exceedingly beautiful. Some were of dark complexion, some of fair complexion, and their eyes were large and captivating like the petals of a lotus. They wore yellow garments, and incomparable sweetness radiated from their forms. All had four arms and were adorned with glittering gems and precious ornaments. The luster of their bodies was as pure and radiant as coral, vaidurya, and lotus stalks. Gleaming earrings in their ears, crowns upon their heads, and necklaces of jewels around their necks enhanced their splendor further.
That realm was surrounded by celestial aircraft (vimanas), upon which great souls were sporting. The radiance of the vimanas and the beauty of the divine women there caused the entire region to glow, just as the sky is illuminated by lightning and garlands of clouds.
There, Lakshmi Herself was present in the Lord's service. She honored the Lord with Her manifold glories, and along with her attendants, she swayed joyfully while singing the Lord's praises. Bringing flowers from the groves, she lovingly offered them to the Lord. There Brahma beheld the Lord of all Sattvatas, the Lord of Lakshmi, the Lord of Yajnas, and the Lord of the universe. He was being served by His chief attendants -- Sunanda, Nanda, Prabala, Arhhana, and others. The Lord's countenance was radiantly turned toward His devotees with a gracious gaze. His eyes carried a reddish tinge from His joyful smile. He wore a crown, earrings, and was resplendent in yellow garments, and upon His chest the mark of Lakshmi (Shrivatsa) was luminous. He was seated upon a most venerable throne. Around Him, His sixteen primary shaktis (powers) and five secondary shaktis were present in embodied form. Endowed with all permanent and transient majesties, He was blissfully presiding in His own abode.
At this darshana, Brahma's heart was completely overwhelmed with joy. His body was thrilled with divine ecstasy and his eyes overflowed with tears of love. He prostrated at the lotus feet of the Lord. This is that divine path which only the Paramahamsa Mahatmas can attain.
In the Bhagavata Purana itself, the following description of the devotee Dhruva's journey to Vaikuntha is found, which sheds light on the qualifications required for attaining Vaikuntha:
"Dhruva ascended that celestial aircraft, which was like a jewel of the sky. The vimana rose higher and higher -- the three worlds were left behind, the celestial realms receded, even the brilliance of the Saptarshis (the seven great sages) became, as it were, a mere backdrop. Above all realms, filled with infinite peace and wondrous radiance, that divine abode appeared before him. This abode was not illuminated by the light of any sun or moon but shone by its own effulgence. And wonder of wonders -- by that very effulgence, all worlds, the entire creation, even the three realms were illuminated. But this path is not an easy one -- the right to reach here does not belong to those whose hearts are hard, who are cruel to living beings, or who are bound in selfishness. It opens only for those who are engaged day and night in auspicious deeds, whose minds are at peace, who see all with equal vision, who are pure, whose gaze is satisfied only in giving happiness to others. And especially those who regard the devotees of the Lord as their supreme friends, their only true well-wishers -- such Mahatmas naturally become the rightful claimants of this supreme divine abode."